Lock



look without in any Patented Jan. 7, 1930 EDWARD N. JACOBI, OFMILWAUKEE, CORPORATION, OF MILWAUKEE,

WISCONSIN, ASSIGNOR TO BRIGGS WISCONSIN, A CORPORATION OF AND STRATTONDELAWARE LOOK Application filed October 25, 1928. Serial No. 314,949.

g This invention relates to certain new and useful improvements in lookstructures and has as an object the provision of an improved lockassembly whereby the tumbler carrying cylinder and the casing ormounting head therefor may be die cast to eliminate machining to thusreduce costs and produce a cheaper wise impairing its ethciency.

Another object of this invention resides in the provision of an improvedlockstructure which is so designed and constructed as to permit theready securement of the tumbler carrying cylinder in its casing ormouting head and having cooperating means between the cylinder andcasing whereby, after having once been assembled, the removal of thecylinder from the casing is prevented.

A further object of this invention resides in the provision of animproved lock structure of the character described having a detentaction to definitely indicate the positions of the lock.

A still further object of this invention resides in the provision of alock structure having an improved manner of drivingly'connecting the endcap wlth the cylinder whereby the end portion of the cylinder projectedI through the casing or mounting head is not unnecessarily enlarged.

With the above and other objects in View which will appear as thedescription proceeds, my invention resides in the novel construction,combination and arrangement of parts substantially as hereinafterdescribed and more particularly defined by the appended claims, it beingunderstood that such changes in the precise embodiment of thehereindisclosed invention may be made as come within the scope of theclaims.

In the accompanying drawings, I have illustrated two complete. examplesof the physical embodiment of my invention constructed according to thebest modes I have so far devised for the practical application of theprinciples thereof, and in which:

Figure 1 is an end elevational view of a lock embodying my invention;

Figure 2 is a View, partly in. section and views,

partly in elevation, taken through Figure l on the plane of the line2-2;

Figure 3 is a perspective view of the inner end of the lock casing orcylinder mounting head;

Figure 4: is a perspective view of the inner end of the lock cylinderand the cam shell detached therefrom;

Figure 5 is a View, similar to Figure 1, of a slightly modified form ofmy invention; and

Figure 6 is a view of the inner end of the lock, with parts in sectionand parts in elevation, said View being taken through Figure 5 on theplane of the line 66.

Referring now more particularly to the accompanying drawing, in whichlike numerals designate like parts throughout the several 5 represents alock cylinder mounting head or casing having a central bore 6 ex tendedtherethrough and reduced in diameter at its outer end, as at 7 toprovide a shoulder 8 which terminates in an annular recess or countebore9 communicating with the bore 6, for the purpose later described. Thewall of the bore 6 is provided with diametrical opposed, longitudinalslots 10, into which the tumblers 11 of a lock cylinder 12 extend whenthe key 13 is withdrawn from 14 of the cylinder. 7

The cylinder 12 is inserted in the casing or mounting head 5 from therear, and has its outer end 15 slightly reduced to provide a shoulder 16against which the inner end of an end cap member 17 abuts. The externaldiameterof the cap is substantially equal to that of the reduced bore 7and the innerperipheral edge thereof is flanged laterally to provide anannular shoulder 18 which cooperates with the shoulder 8 to restrainaxial movement of the cylinder through the reduced bore 7. An opening 19is formed in the cap memher in register with the key opening 14 and oneor more tongues or projections 20 extended inwardly from the innerperipheral edge of the flanged portion to engage in correspondinglyshaped recesses 21 in the cylinder 12 to drivingly connect the cap withthe cylinder. This manner of connecting the end. cap with the cylinderprovides a neat structure and the key opening makes possible the use ofthe cap on a smaller type of lock.

The rear or inner end of the casing or mounting head 5 is counterbored,as at 22, to receive an annular flange or enlargement 23 formed on theinner end of the cylinder 12. A pair of spaced lugs or projections 2etextended from the adjacent or inner end of the casing, cooperate withthe flange 23 to prevent rearward movement of the cylinder from thecasing after assembly, the projections be ing of approximately V shapewith their apeires disposed inwardly to overlie the countcrbore 22 andhaving their opposite sides reduced or cut away, as at 25, for a purposelater described.

The flange 23 of the cylinder is recessed or cut away, as at 26 and 27.so that in assembling the lock, the cylinder may be inserted in thecasing or housing 5 from the rear, the recesses 26 and 27 permitting theflange to pass the projections 24. After the cylinder has been inserted,it is rotated to disalign the recesses 26 and 27 with the projections 24and thus secure the cylinder in the casing, means, to be laterdescribed, being provided to prevent the realignment of the recesses andprojections.

The extreme inner end of the cylinder is provided. with an eccentric cam28 adapted to engage with the element to be locked. not shown, in thecustomary manner and it likewise has a notch or recess 29 which forms acontinuation of the recess 27 to permit the insertion of thecylinder inthe casing. The cylinder having been inserted and rotated to disalignthe recesses 26 and 27 with the overhanging lips 30 of the projections24 is then secured against removal by pressing a cam shell 31 ofapproximately ring shape onto the cam 28. The inner wall of the camshell is serrated, as at 32, to form a non-rotatable connection withthe'cam when it is pressed thereon, and swedged over tongues orprojections 33 carried by the cam 28 prevent detachment of the camshell. As stated, the shell 31 prevents the rotation of the cylinder torealign the recesses 26 and 27 with the projections 2% by forming a stopwhich engages the project-ions 24 as shown in Figure 1.

T 1e two positions of the cylinder with the tumblers 11 and slots 10registering so that the key may be withdrawn are indicated by a detentaction provided by a plunger 3 k mounted in a bore 35 formed in theinner end of the casing or mounting head 5 in communication with thecounterbore 22 and at all times urged to engagement with the inner faceof the flange 23 by a spring 36. The cylinder 12 is permitted a limitedaxial movement in the casing or mounting head, and the outer face of theflange 23 is provided with reduced portions 37 with which theover-hanging lips 30 engage when the cylinder is at either of its limitsof movement, the

end walls of the recesses 37 being cammed or inclined, as at 38, tofacilitate the movement of the raised ortions of the flange 23 under theover-hanging lips 30.

In Figures 5 and 6, a slightly modified structure is illustrated inwhich the rotation limiting action of the cam shell for retaining thecylinder within the casing or mounting head is replaced by a pin 39secured in the inner end of the mounting head or casing after thecylinder has been inserted and rotated, to prevent the realignment ofthe recess s 26 and 27 with the projections 24. In this construction,the detent action is eliminated and the limits of rotation of the lockre defined by the pin 39 abutting the shoulders 40 of the flange 23.

From the toregoin description, taken in connection with the accompanyingdrawings, it will be readily apparent to those skilled in the art towhich an invention of the character described appertains, that I providea novel and improved lock assembly whereby the labor costs in assemblingare reduced, and whereby the lock may be formed with two parts, namely,the cylinder and the mounting head or casing without the necessity ofany machining operation other than the original formation thereof by diecasting, and that a locl; is provided which has a detent action toindicate its aositions.

What I claim as my invention is:

1. In a lock including a lock cylinder casing having a bore, a lockcylinder rotatable in the casings bore and insertable therein from oneend and means limiting the axial movement of the cylinder beyond thecasings other end, stops carried by the casing and by which the cylinderpasses while in a certain position with respect to the casing duringassembling of the lock, and means for preventing movement of thecylinder to said position after the lock has been assembled whereby thecylinder is operatively secured in the casing.

2. In a lock including a lock cylinder casing, a lock cylinder rotatablein the casing and movable in the casing to diflerent positions, anddetent means including a longitudinally movable member in the wall ofthe casing for indicating the different positions of the cylinder in thecasin 3. In a lock including a lock cylinder casing having a bore, alock cylinder rotatable in the bore and having limited axial movementtherein, spring means normally urging the cylinder axially in onedirection, and cooperating means carried by the cylinder and the casingto provide a detent action to determine the definite positions of thecylinder in the casing.

4. In a lock including a lock cylinder casing having a bore, a lockcylinder rotatable in the bore and having limited axial movementtherein, a flange on one end of the cylinder,

projections carried by the casing and overhanging the flange, springmeans normally yieldably urging the flange against the projections, andmeans carried by the flange and abutting the projections to provide adetent action indicating the positions of the cylinder in the casing.

5. A lock comprising a casing having a bore reduced in diameter at itsouter end to form a shoulder and enlarged at its inner end, a lockcylinderinsertable in the casing bore from the rear, means on the outerend of the cylinder engaging the shoulder of the casing bore torestrain. movement of the cyl- V inder outwardly of the casing outerend, a

flange on the inner end of the cylinder, an inwardly extended projectioncarried by the rear end of the casing, the flange having a recessthrough which the projection passes in assembling the lock, and meanspreventing the registering of the recess with the projection after thelock has been assembled to prevent the detachment of the cylinder fromthe casing.

6. A lock,comprising a casing having a bore reduced in diameter at itsouter end to form a shoulder and having a counterbore at its inner end,a lock cylinder insertable in the casing bore from the rear, means onthe outer end of the cylinder engaging the shoulder of the casing boreto restrain movement of the cylinder outwardly of the casing outer end,a flange on the inner end of the cylinder, and disposed in thecounterbore of the casing, a

' projection carried by the rear end of the easing and extended oversaid counterbore, said flange having a recess through which theprojection passes in assembling the lock, and means preventing theregistering of said recess with the projection after the lock has beenassembled to prevent the detachment of the cylinder from the casing.

7. In a lock including a lock cylinder casing having a bore, a lockcylinder rotatable in the bore and insertable therein from one end andmeans limiting outward movement of the cylinder at its other end, aprojection formed on the casing and extending into the bore, the lockcylinder having a recess which, when aligned with the projection,permits the insertion of the cylinder in the casing bore, and meanspreventing alignment of the recess and projection after assembling,

whereby the cylinder is operably secured in the casing bore.

8. In a lock including a lock cylinder casing having a bore, a lockcylinder rotatable in the casing bore and insertable therein from oneend and means limiting axial movement of the cylinder beyond the casingother end, a projection carried by the casing and by which the cylinderpasses while in a certain position with respect to the casing duringassembling of the lock, a cam extended from r the lock cylinder, and acam shell secured on the cam after the lock cylinder is assembled withthe casing, said cam shell preventing movement of the lock cylinder tosaid cer tain position with respect to the casin 9. A look, comprising acasing having a bore, a lock cylinder insertable in the casing bore fromits rear, means preventing movement thereof through its other end, aprojection carried by the rear of the casing and extended into the bore,said lock cylinder having a recess through which the projection passesin assembling the lock, a cam carried by the lock cylinder, and a camshell mounted on the cam after the cylinder is assembled with thecasing, said cam shell preventing movement of the lock cylinder to aposition aligning its recess with the projection Whereby the cylinder isoperably secured in the casing.

10. In a lock including a lock cylinder casing having a bore, a lockcylinder rotatable in the casing bore and insertable therein from oneend, a shoulder formed at the other end of the casing bore to preventoutward movement of the lock cylinder therethrough, a protecting capinserted between the adjacent end of the lock cylinder and the shoulder,and a lug extended from the cap member and received in a recess formedin the lock cylinder to non-rotatably connect the cap with the lockcylinder.

11. In a lock including a lock cylinder casing having a bore reduced atone end to form a shoulder, a lock cylinder rotatable in the casing boreand having one end reduced to form a shoulder which cooperates with theshoulder formed by the reduced portion of the casing bore to restrainoutward movement of the lock cylinder through the bore, a protecting cappositioned on the reduced end of the lock cylinder and having a flangedisposed between said shoulders, and a projection extended from theflange and received in a recess formed in the lock cylinder inwardly ofits shoulder to non-rotatably connect the protecting cap with the lockcylinder.

In testimony whereof I have hereunto affixed my signature.

EDWARD N. JAGOBI.

